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Open the current desktop Companion and leave Internet relay selected.
Check Connection for online, reconnecting or offline status. Check internet, VPN and proxy restrictions.
Choose Open Companion from the website. If no app opens, install the current Windows release and allow the browser’s app-opening prompt.
Approve the matching code. If access was revoked or browser storage cleared, pair again.
Use Help and Activity in Companion for diagnostics. Local folder and legacy HTTP are separate Advanced modes that must match on both sides.
| Symptom | Next step |
|---|---|
| Browser approval rejected | Pair again using Open Companion and compare the new confirmation. Revoked credentials cannot reconnect. |
| Connected, but no slicer available | Configure and enable the slicer in desktop Slicer Setup, then Test Open and apply/restart. |
| No exact printer/nozzle preset | Install the actual machine/nozzle preset and point Companion at the full native resources folder. |
| Recipe capability missing | Update Companion using Check for Updates → Install & restart. An older placeholder updater needs the current updater-enabled installer or developer source app once. |
| Slicer settings unchanged | Use the Companion native project and Open as project. A geometry-only STL/3MF cannot replace the active slicer recipe. |
| A transfer times out | Keep Companion online and inspect Activity. Cancel the pending transfer before retrying; avoid starting duplicate requests. |
| Export button disabled | Wait for regeneration and resolve current mesh, volume or settings errors. |
| App does not open from browser | Install the current Windows Companion. Choose Pair this browser, then Open Companion. If app links are blocked, copy the one-time link and use Connection → Paste pairing link in the app. |
- Studio and Companion versions, printer brand/model, nozzle and material.
- The source part number, chosen test/range/sample and saved profile name.
- The exact error text and whether it occurred during pairing, preparation, download or opening.
- A redacted Activity Log excerpt and the actual slicer/project values. Do not include private browser credentials or key files.